Nisshin’s best seller fluorocarbon furled taper lines “PALS Fujiryu Tenkara-basu SP Pro. The lines are made by twisting 4 to 7 fluorocarbon lines.
I have often made lines similar to this by hand – even before tenkara I made these for western fly fishing leaders. To put it simply this type of line makes casting almost effortless. The lines practically cast themselves and roll out beautifully with minimal effort.
They’ll turn over larger dry flies and cast into the wind much better than fluorocarbon level lines. They’re pretty nice for wind.
When backcasting room is at a minimum these lines are also nice – they’ll roll cast easily.
One Japanese tenkara acquaintance of mine had the opinion that fishing with a fluorocarbon level line was the equivalent of Sonny Rollins or John Coltrane using a plastic toy saxophone and that this type of tapered line was the real deal worthy of a great player.
But I always say “different strokes for different folks” – nonetheless the difference between these lines and level lines is pretty striking.
They’ll also float pretty well – and an application of fly floatant will help even more.

These lines appreciate a nice home when not being fished and I highly recommend storing them on a line spool such as the Mieho Chibamaru Spool.

**** A word of caution ****
If you get a snag in a tree or rock, etc… and need to pull on the line to break the tippet – the line may rebound and then look like tangled mess. Do not fret.
This is almost always easily remedied by shaking the line a bit and even doing some false casting with it.